Cephalothoracopagus is a very rare form of conjoined twinning, which occurs in one of every million births and in one of every 58 sets of conjoined twins.
Here we present a classic case of Cephalothoracopagus janiceps monosymmetros diagnosed at 24 weeks gestation.
On the basis of sonographic appearances the conjoined twin fetuses were labeled as Cephalothoracopagus janiceps monosymmetros.
The delivered fetus confirmed our diagnosis of the conjoined twins, male Cephalothoracopagus janiceps monosymmetros (fused head with only one of the face well developed, the opposite one being rudimentary).
In our case, we have shown interesting morphologic date concerning a rare and fascinating configuration of conjoined twinning called janiceps (Cephalothoracopagus Symmetricus) using antenatal conventional and color Doppler ultrasound and confirming the findings by postmortem radiography and CT.